Perhaps you should try some spelling variations:
"donauschwabisches christentum heft 12" » "donauschwabisches schrifttum heft 12" (Expand Search), "donauschwabisches christentum der 12" (Expand Search), "donauschwabisches christentum eine 12" (Expand Search), "donauschwabisches christentum heft 1" (Expand Search), "donauschwabisches christentum heft 2" (Expand Search), "donauschwabisches christentum heft 10" (Expand Search)
"dopnauschwabisches schrifttum heft 9" » "donauschwabisches schrifttum heft 9" (Expand Search), "dopnauschwabisches schrifttum heft 3" (Expand Search), "dopnauschwabisches schrifttum heft 1" (Expand Search), "dopnauschwabisches schrifttum heft 2" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("donauschwabisches christentum heft 12") OR ("dopnauschwabisches schrifttum heft 9"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"donauschwabisches christentum heft 12\") OR (\"dopnauschwabisches schrifttum heft 9\"))".
• Removing quotes may allow a broader search: (( donauschwabisches christentum heft 12 ) OR ( dopnauschwabisches schrifttum heft 9 )).
• Adding a wildcard symbol may retrieve word variants: (("donauschwabisches christentum heft 12") OR ("dopnauschwabisches schrifttum heft 9"))*.